Make flake self-contained - consolidate installer-replication

BREAKING CHANGE: Remove external dots-hyprland dependency

- Imported all essential configs from dots-hyprland/installer-replication
- Added complete configs/ directory with:
  - hypr/ - Hyprland configuration
  - quickshell/ - Quickshell widgets and config
  - applications/ - Application configurations
  - scripts/ - Utility scripts
  - matugen/ - Material You theming
- Updated flake.nix to use local ./configs instead of external repo
- Simplified update-flake script (removed external repo management)
- Updated README to reflect self-contained architecture
- All builds pass with local configurations

Benefits:
- No external repository dependencies
- Faster builds (no network dependencies)
- Version controlled configs in single repo
- Easier maintenance and development
- Complete installer replication in one place

configs/quickshell/modules/common/widgets/ContentSubsection.qml

@@ -0,0 +1,46 @@
+import QtQuick
+import QtQuick.Layouts
+import qs.modules.common
+import qs.modules.common.widgets
+
+ColumnLayout {
+    id: root
+    property string title: ""
+    property string tooltip: ""
+    default property alias data: sectionContent.data
+
+    Layout.fillWidth: true
+    Layout.topMargin: 4
+    spacing: 2
+
+    RowLayout {
+        ContentSubsectionLabel {
+            visible: root.title && root.title.length > 0
+            text: root.title
+        }
+        MaterialSymbol {
+            visible: root.tooltip && root.tooltip.length > 0
+            text: "info"
+            iconSize: Appearance.font.pixelSize.large
+            
+            color: Appearance.colors.colSubtext
+            MouseArea {
+                id: infoMouseArea
+                anchors.fill: parent
+                hoverEnabled: true
+                cursorShape: Qt.WhatsThisCursor
+                StyledToolTip {
+                    extraVisibleCondition: false
+                    alternativeVisibleCondition: infoMouseArea.containsMouse
+                    content: root.tooltip
+                }
+            }
+        }
+        Item { Layout.fillWidth: true }
+    }
+    ColumnLayout {
+        id: sectionContent
+        Layout.fillWidth: true
+        spacing: 2
+    }
+}